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COM20022 View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
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COM20022
10Mbps ARCNET controller with 2Kx8 on-board RAM
SMSC -> Microchip
COM20022 Datasheet PDF : 88 Pages
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XTAL1
XTAL2
AD0-AD7
ALE
A15
RESET
nRD
nWR
nINT1
8051
COM20022
AD0-AD2, D3-D7
A2/BALE
nCS
nRESET
nRD/nDS
nWR/DIR
nINTR
RXIN
nTXEN
nPULSE1
nPULSE2
GND
75176B or
Equiv.
Differential Driver
Configuration
A0/nMUX
XTAL1
XTAL2
27 pF
20 MHz
XTAL
27 pF
*Media
Interface
may be replaced
with Figure A, B or C.
RXIN
TXEN
nPULSE1
nPULSE2
GND
+5V
100 Ohm
BACKPLANE CONFIGURATION
FIGURE A
RXIN
+5V
2
6 Receiver
HFD3212-002
7
nPULSE1
+5V
Transmitter
3
HFE4211-014
2
6
7
2 Fiber Interface
(ST Connectors)
NOTE: COM20022 must be in backplane mode
FIGURE B
FIGURE 2 - MULTIPLEXED, 8051-LIKE BUS INTERFACE WITH RS-485 INTERFACE
15
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